Franklin D. Roosevelt (FDR) was the only U.S. President elected to four terms, leading the country through the Great Depression and World War II. Paralyzed from the waist down by polio in 1921, he projected an image of strength and optimism to a struggling nation. His 'New Deal' programs—including Social Security and the Securities and Exchange Commission—fundamentally changed the relationship between the American government and its citizens by creating a social safety net. During the war, he formed a powerful alliance with Winston Churchill and Joseph Stalin to defeat the Axis powers. His 'Fireside Chats' used the radio to communicate directly with the public, making him one of the first truly modern media-savvy politicians. His legacy is defined by his expansion of executive power and his vision for a post-war international order, which eventually led to the creation of the United Nations.